1 Division of Neurointerventional Radiology, Neuroscience Institute, Abbott Northwestern Hospital, Minneapolis, MN, USA; Department of Radiology, University of Iowa, Iowa City, IA, USA.
2 Department of Neurosurgery, Washington University, St Louis, MO, USA. Electronic address: [email protected].
3 Department of Neurosurgery, Emory University, Atlanta, GA, USA.
4 Mallinckrodt Institute of Radiology, Washington University, St Louis, MO, USA.
5 Department of Neurosurgery, Washington University, St Louis, MO, USA; Mallinckrodt Institute of Radiology, Washington University, St Louis, MO, USA.
6 Division of Neurointerventional Radiology, Neuroscience Institute, Abbott Northwestern Hospital, Minneapolis, MN, USA.